I don't think this alone is going to help if the housing is worn as, even with a 15mm deeper bearing, it is going to move laterally due the bore not being a uniform diameter. Even if it initially cures the rotational creep, the lateral movement will ultimately wear the housing further and the bearing will start to creep again.

If you don't want to buy a carrier, then one possible option might be to machine out the housing so it can take a bearing 1mm larger in diameter (whether that be the stock width or a wider double row type). You will then be able to reinstate the right level of interference and get the bearing to fit tightly. You'd obviously need to check first what bearing diameters are available before you start work.

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